You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Facundo_Scordos_task_alert" />
  </query-continue>
  <query>
    <pages>
      <page pageid="7" ns="0" title="Basic Task States" />
      <page pageid="1362" ns="0" title="Cayelan Careys task alert" />
      <page pageid="1506" ns="0" title="Chris Duffys task alert" />
      <page pageid="8" ns="0" title="Contribute as Owner" />
      <page pageid="3" ns="0" title="Contribute as Participant" />
      <page pageid="1751" ns="0" title="Corinna Griess task alert" />
      <page pageid="9" ns="0" title="Create Task" />
      <page pageid="1096" ns="0" title="Derek Robertss task alert" />
      <page pageid="4" ns="0" title="Exploring Tasks" />
      <page pageid="12" ns="0" title="Extended Task States" />
    </pages>
  </query>
</api>